Resinous compositions



- Patented June 8, 1937 UNITED STATES PATENT OFFlC-E mssmous coMPosrrroNs No Drawing. Application April 6,1935, Serial No. 15,136

'1 cla m -(01. 106-22) V This invention relates to new resinous compositions and particularlyto-plastic, fire-resist ant compositions containing resins of the phenolaIdehyde type and to new resin-fiber compositions containing the same.

A principal purpose of the invention is the production of a plastic, fire-resistant resinous composition.

A further object of the invention is' the prol0 duction of fire-resistant, resin-fiber compositions.

capable of being punched cold without crazing or cracking.

Another object is the production of a cold,- punching resin-flber-composition of high are resistance.

These and other purposes and advantages areeffected by plasticizing a phenol-aldehyde resin, particularly a heat-hardenable resin, with a triaryl phosphate, such as tricresyl-phosphate, and

2 a chlorinated naphthalene.

It has been found th t by the concurrent-use of triaryl phosphates and chlorinated naphthalene in phenolic resins; a high degree of flame resistance can be obtained, and that resin-fibercompositions made therefrom, for example, laminated products, are distinguished not only by an exceptional degree of flame resistance but by a high are resistance and by the ability to withstand cold punching without crazing -or crackq While the use 61' chlorinated naphthalene for increasing the flame resistance of compositions;

has been previously proposed, phenolicresin compositions containing substantial amounts of chlorinated naphthalene are not satisfactory for many purposes as the chlorinated naphthalene very readily separates from the resin. For example, when a varnish comprising a solution of a phe-- nolic resin and including substantial amounts of chlorinated naphthalene is allowed to' dry in a fllm, a deposit of clorinated naphthalene separates put which for many purposes is very undesirable. It has now been found that by simuly taneously adding triaryl phosphates to the resin composition, not only may substantial amounts of chlorinated naphthalene be added to-the com-' position without separating out, but the result- 7 der thetr'ade-mark fHalowaxff. A product comprising a mixture of triandtetra-chloro-napb thalenes has-been found suitable for use in the invention.

A wide variation in the amounts of chlorinated naphthalene and triaryl phosphate is possible, but in general an amount of triaryl phosphate sufllcient to prevent separation of the chlorinated naphthalene should be used. The chlorinated naphthalene may be added to the phenol-aldehyde condensation product after it is made or during the condensation process.

A satisfactory method of utilizing the phenolic resintriaryl phosphatechlorinated naphthalene products of the invention'is to form varnishes bydissolving the products in volatile solvents. Fibrous materials either in loose or sheet form may be impregnated with these varnishes and molded into anyrdes'ired-shape and converted into a permanently har'denedcondition by heating underrpressure.

For example, a resin varnish is produced by 1 reacting parts of cresylic, acid, 78.55 parts of 37% aqueous formaldehyde solution and 3.5 parts of 26 Beaum aqueous ammonia and adding 5 70.5 parts of denatured alcohol. To 1400 parts of this varnish are added 259 parts of chlorinated naphthalene, 200 parts of tricresyl phosphate and.

250 parts of toluol.

This varnish may be used, for example, to impregnate sheetsoi fibrous material such as asbestos, kraft ;.paper, or textile fabrics. When 'such impregnated sheets are superposed and the. superposed sheets hardened under heat and pressure, there is produced a laminated structure 35 having high flame and arc resistance and capable of being cold'punched without crazing or crack- -I claim: A x 1. Azresinous composition comprising a heathardenable phenol-aldehyde condensation product, a chlorinated naphthalene and a triaryl phosphate in amount suflicient to prevent separation of the chlorinated naphthalene.

2. -A resinous composition comprising a phenolaldehyde condensation product, a chlorinated naphthaleneand tricresyi phosphate in amount vsufficient to prevent separation of the chloriated naphthalene.

3. A resinous composition comprising a phenol- Jaldehy'de condensation product, a chlorinated naphthalene and a triaryl phosphate in amount sufficient. to prevent separation of the chlorinated naphthalene.

as 'resindlber composition comprising a ss thalene and a triaryl phosphate in amount sumnaphthalene.

5; A resin-fiber composition comprising a fibrous material, a heat-hardenable phenol alde hyde condensation product, a chlorinated naphthalene and tricresyl'phosphate in amount sumcient to prevent separation of thechlorinated:

naphthalene.

fibrous material, a heat-hardenable phenol-aldehyde condensation product, a chlorinated naph-" j v material, aheat-hardened phenol-aldehyde condensation product, a chlorinated naphthalene and a triaryl phosphate in amount suiiicient to prevent separation of the chlorinated naphthalene.

7. ;A- resin-flber article comprising a .flhroua materiaLga heat hardened phenol-aldehyde conden'sation product, a chlorinated naphthalene and tricresyl phosphate in amount suflic'ient to prevent separation of the chlorinated naphtha- 10 'lene'." 6. A resin-flber-articlecomprising a fibrous H oam p. Hanson. 

